From 23acb4d17be66a55fd142657afea4218b2012c7e Mon Sep 17 00:00:00 2001
From: Claude Heintz <dev@macluxpro.com>
Date: Thu, 22 Jun 2017 12:40:31 -0500
Subject: [PATCH] Two Stop Bit Workaround (#461)

* Update esp32-hal-uart.c

* Two Stop Bit Workaround

see https://github.com/espressif/esp-idf/blob/master/components/driver/uart.c  lines 118-127
---
 cores/esp32/esp32-hal-uart.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/cores/esp32/esp32-hal-uart.c b/cores/esp32/esp32-hal-uart.c
index 3b81a536..4730720b 100644
--- a/cores/esp32/esp32-hal-uart.c
+++ b/cores/esp32/esp32-hal-uart.c
@@ -195,6 +195,13 @@ uart_t* uartBegin(uint8_t uart_nr, uint32_t baudrate, uint32_t config, int8_t rx
     uartSetBaudRate(uart, baudrate);
     UART_MUTEX_LOCK();
     uart->dev->conf0.val = config;
+    #define TWO_STOP_BITS_CONF 0x3
+    #define ONE_STOP_BITS_CONF 0x1
+	
+    if ( uart->dev->conf0.stop_bit_num == TWO_STOP_BITS_CONF) {
+        uart->dev->conf0.stop_bit_num = ONE_STOP_BITS_CONF;
+        uart->dev->rs485_conf.dl1_en = 1;
+    }
     UART_MUTEX_UNLOCK();
 
     if(rxPin != -1) {